# Relationship history for MSHA mine 3606302

Current hierarchy: **Romani Francis J → Lawrence Resources Inc → Lawrence Mine No 1 Strip**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Lawrence Resources Inc → Lawrence Mine No 1 Strip; 1976-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Romani Francis J → Lawrence Mine No 1 Strip; 1976-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Romani Francis J → Lawrence Resources Inc; 1976-12-01 to current/open; source msha-controller-operator-history